Mill.



J. D. MARSHALL.

MILL.

APPmoATloN rummu 27. 1914.

Patented Sept.v 8, 1914.

wmaoom 1HE' NpRRls PETERS CO., PHOTDYLITHOA. WASHING 10N. n 1' JEFFERSOND. MARSHALL, F NEW-ORLEANS, LOUISIANA,

. MILL.

Specification of Letters Patent. Application iled May 27, 1914.

Patented Sept.` 8, 1914. serial No. 841,178.

To all whom it may concern.'

Be it known that I, JEFFERSON D. MAR- SHALL, a citizen of the UnitedStates, and a resident of New Orleans, in the parish of Orleans andState of Louisiana, have invented a new and Improved Mill, of which thefollowing is a specification. i

This invention relates to means for resisting the stresses onV the upperrolls of three-roll mills, especially of mills for crushing sugar cane,and its object is to prol, to Y each other be positioned by mill-housingl the lower roll-shafts and the upper rollvide a mill in which the boltsfor resisting these stresses are arranged substantially parallel to theplane connecting the axis of the upper roll with the axis of one of thelower rolls. l y

This invention consists in a three-roll having a slot to receive one ofshaft, together with the bearings therefor, and bolts extendingsubstantially parallel and to the line of thrust of these rolls, fromthe upper cap down through the base of the housing.

In the accompanying drawing, which is a side elevation of a mill forcrushing sugar cane provided with three rolls in triangular relationwith their axes parallel, 1 indicates the base upon which the housing 2is secured in any desired manner, The shaft 4 of the roll 5 is mountedin a quarter-box 6, and the cap 7, ram 8, and rods 9 may be of the sameconstruction as similar parts in the Bancroft Patent, Number 1,023,355,dated April 16, 1912. It will be understood that a like construction isused for the other side of the mill.

The housing 2 is formed with an inclined slot or pocket 11, in which ismounted the bearing 12, for the shaft 13 of the second lower roll 14. Awedge-plate 15, which may the screw 16, supports this bearing.

the upper roll 20 rests on the shoulders 18 and prevents metallicengagement between the rolls 2O and 14, The upper bearing 22 and that inturn mounted in the is engaged by the plate 23, by the hydraulic ram 24,

bolts 3' being shown. v

The lower bearing 17 of the shaft 19 of l cap 25, in the manner shown inthe Bancroft Patent Number 1,095,067, dated April 28, 1914. The rods 26may have nuts 27 at their upper ends and keys 28 at their lower ends.They extend substantially parallel to the plane passing through the axesof the rolls 14 and 19, and therefore parallel to the lines of stressbetween these rolls, through the bed 1, housing 2 and cap 25. The rods 9extend across through the housing on both sides of the shaft 13 toreinforce it.

Ihe sugar-cane, in the form of short chips, passes to the mill from theright in the drawing, and between the rolls 5 and 20, the distancebetween these rolls being determined by the ram 8. After thispreliminary squeezing, the ch tween the rolls 14 and 20, receiving thefull pressure of the upper roll under the force of the hydraulic ram 24,and give up substantially` all the extractable juice. f

The part 30 of the housing is reinforced by the cap 25 and by the rods9, so that there is little danger of this part'ofr the housing breakingaway. As the shafts 13 and 19 are in the same slot, one'cap is saved. Asmost of the comparatively light stresses, arising from cane passingbetweeny the rolls 5 and 20, are taken up'by the rods 9, and as all thestresses arising from the cane passing between the rolls 14 and 20 aretaken by the rods 26, the hosing may be made comparatively light.

I claim: y 1. A sugar mill comprising a base, a housing mounted thereon,three crushing rolls andthe shafts for the same, said housing having apocket and an inclined slot, a bearing for one of the roll shaftsmounted in the pocket, bearings for the two other roll shafts mounted insaid inclined slot, a cap at the upper end of the slot, and boltsextending through the cap, housing and base, parallel yto the planepassing through the axes of the ips are crushed beslot, hearings for twoof the roll shafts specification n the presence of two suh- Iroultec insaclbslot, a capdat the outer end scrbng witnesses. o t e s ot, an oltsexten ing through the cap and housing parallel to and on each sideJEFFERSON D MARSHALL' of the plane passing through the axes of theWitnesses: shafts in the slot. F. E. ZIMMER,

In .testimony whereof I have signed'this S. L. GRILLOT.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

